Esempio n. 1
0
// DeployService takes a charm and various parameters and deploys it.
func DeployService(st *state.State, args DeployServiceParams) (*state.Service, error) {
	if args.NumUnits > 1 && args.ToMachineSpec != "" {
		return nil, errors.New("cannot use --num-units with --to")
	}
	settings, err := args.Charm.Config().ValidateSettings(args.ConfigSettings)
	if err != nil {
		return nil, err
	}
	if args.Charm.Meta().Subordinate {
		if args.NumUnits != 0 || args.ToMachineSpec != "" {
			return nil, fmt.Errorf("subordinate service must be deployed without units")
		}
		if !constraints.IsEmpty(&args.Constraints) {
			return nil, fmt.Errorf("subordinate service must be deployed without constraints")
		}
	}
	if args.ServiceOwner == "" {
		args.ServiceOwner = "user-admin"
	}
	// TODO(fwereade): transactional State.AddService including settings, constraints
	// (minimumUnitCount, initialMachineIds?).
	service, err := st.AddService(
		args.ServiceName,
		args.ServiceOwner,
		args.Charm,
		args.IncludeNetworks,
		args.ExcludeNetworks,
	)
	if err != nil {
		return nil, err
	}
	if len(settings) > 0 {
		if err := service.UpdateConfigSettings(settings); err != nil {
			return nil, err
		}
	}
	if args.Charm.Meta().Subordinate {
		return service, nil
	}
	if !constraints.IsEmpty(&args.Constraints) {
		if err := service.SetConstraints(args.Constraints); err != nil {
			return nil, err
		}
	}
	if args.NumUnits > 0 {
		if _, err := AddUnits(st, service, args.NumUnits, args.ToMachineSpec); err != nil {
			return nil, err
		}
	}
	return service, nil
}